Exactly six months ago, Eric Schmidt made a remark that in the near future, developers might want to focus on Android first, instead of iOS. While developers haven't moved to Android-first, iOS-later en masse, there's no denying that we're seeing more and more former iOS exclusives move towards Android.

XDA has actually started as Windows Mobile hacking community. They were trying to get WM handsets to run Linux, continuing support for HTC HD2 (that has recently got ICS treatment) is testament to that.
They are working on getting WP more customizable that it initially was. Seeing the amount of good will WP gets there it's funny to see MS screwing them over time and again, by playing cat and mouse with their root methods, making promises and then withdrawing and so on.